Coexistence and Extinction Pattern of Asymmetric Cyclic Game Species in a Square Lattice

• Published in: Communications in theoretical physics Vol. 53; no. 6; pp. 1201 - 1204
• Main Author: 董林荣 李永明 杨光参
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.06.2010
• Subjects: 人口规模; 平均强度; 游戏系统; 灭绝物种; 非对称循环
• ISSN: 0253-6102
• DOI: 10.1088/0253-6102/53/6/41

The co-evolutionary dynamics of a cyclic game system is investigated in a two-dimensional square lattice with the asymmetrical rates for three species. Different with the well-mixed system, coexistence and extinction emerge alternately in the system, where a ＂zero-one＂ behavior is robust for a small population size, whereas, the system is predominated by coexistence for a big population one. We study in detail the influence about the fluctuation to the change of the state, and find that the difference between the maximal amplitude about the fluctuation and the average intensity determines which state the system is ultimately. In addition, we introduce Ports energy to explain the reason of the ＂zero-one＂ behavior. It is shown that the average Ports energy per site is the distance to the ＂zero-one＂ behavior in the model.